If you are posting in order to receive feedback on your ad, I would just caution you not to promise to keep children safe, healthy, and happy. We do our best, but those things are just not within our control sometimes. If another child arrives carrying germs for the flu, we cannot keep the child healthy. And happy... well, it's not all about happy. I don't try to keep a child happy if they need to learn not to hit another child, for example.